Compressor.



L C. SCOVEL, 1n.

coMPREs'son. 'l APPL'l'cAnoN f'uEp Mun. 191s. A 1,218,903. Patented Mar.13,1917. v 2 snEETs-snzu 2.

w W# Y 'V MW t sTnTEsPA-Tnutr oFFIoE.

JoiINCfscoVEL, mi, or CHICAGO, ILLINOIS,` AssIeNon 'ro CREAMERY PACKAGE IIANUFAGTUnINe COMPANY,

To all 'whom it mag/Concern? useful Improvements in Compressors,r of which the following is a specification. l This invention relates to. improvements .in

v"thecylinder; piston andvalves of gas compressors suchas4 are used Vin refrigeratng i' f 2,4 and. 5, are loceted inthe piston head 10.,

systems. y

One object of the invention isto provide "a suction trap in lthe cylinder'walhtlie Isame j l. to be interposedbetweenthe'supply pipe and j 4 the-' inlet port.

A further .obj ect I i Another objectof th'isinvention -is to .pro-

vide' the' piston of the compressorwith ini- 4 proved -inlet'suction valves. In the.'acco1npanying.drawings, Ijhave shown. my" .invention .ashappliedft'o a two` cylinder compressor-` Figure 1 isjan elevational .view of' a' compressor .with parts. in section. Fig.4 2'ji's' `anfenlarged Verticalv sectional view olfva portion ofthe; piston on line 2`-2 of Figa 4. Figa-f3 isa cross-Section Qof the piston'take'n on line 3-`-3`.o'f Fig.. 2-.- v Fig.

the cylinders taken -on `line -f off' f showing the suction trap.'V ig.7 is

" ticalsectional view'of the suction trap Lon-line 7-7iof Fig. 6.1

2. "Fig, V5,is averticalsectional view-oil 1 5-5`of Fig.` 4. Fig., 6' .is a ross-secti bodiment of Illy-'invention but it will `bel-unf.

i' p iston, an exhaust valve 4,43.' dischargepi'pe 5,` a water .jacket 6, and a fly-wheel 7.- Itis .customary to provide aslot or `duct in 4 the side. of the body ofthepiston 'for a gas passage from the inlet port-in the cyllnder wall to the suction valvesin the 'piston head. I 'have provided a direct and unob` structedpassage romthe inlet port 8 V(F1 s. 6 7 j to' the suction inlet valves 9 in t e comrnns'sonl Y 'l Specification ofetters latent; y ApplicationllledMay17,1916;v Serial VNru.v98v,04r0.

of this invention `is tov f provide the Vpiston Awith a direct passage from the 4inletport tothe inlet valves. y y

` the cylinder.

-1 in Figsfz, 4E and 5.: y

.- Between the cylinders 2 and 2b, .Figs (il I willv herein 4describe -thei preferred'4 o F CHICAGO, IL'LINoIs, A'conPoRATIoN or. ILLINOIS.

. 'Patented-Mar. 13,1917.

I piston headiO' hy forming the bodyl of the piston of a'central portion 11a' with radially disposed supporting Yanes 11b, herein shown 1n theshape of a cross inl Figs. 1,2 and 3., I n this mannerv the 'body of the piston is .lightenedconsiderably.l It willzbe seen that. I have replaced' the customary'ducted cylin-I drieal piston with4 onev that iSv-lighter' and more. eiicient.

The inletsuction valves 9 shown-in Figs.

vvHerein I have shown each suction vulve as comprising theyalve 'member 12,;the lseat 13', the annular chamber 4141C belovvithe-seat, theigui'des 15', the hollow cylindrical valve lways ofthe piston through the'h drieal. stem," valve' i p the annular'chamber valveto From the Hforegoing it Will be understood vthat the valve members 12h`ave -a reciproca- 'tory motion which isthe reverse of the piston motion: Suitable means 'are provided to limit this motion upon the. suction stroke, as

`for example, pins 1 8'wli-ich are carried b v the piston ,head 10 and' which extend mein'bers 12. The pins in turn are held `against endwise movement by vsuitable means such as by'one of the piston rings 20 shown andf'a'ehamher 21 is formed. A depending wall or partition 22 divides this Chamber 'into two communicatingchambers 21" and 21", the former communicsrling with the inlet .pipe 1 andthe latte;` oommunicatin f the ports 8 in the'cylinderwalls. T e gas is supplied by the inlet pipe and passes suc! cessively through' the chambers 21 and 21, the'fports 8, the piston 3 and the suction valves 9 into the Cylinder. In the working -cycle of the refrifgerating fluid, vaporiznwith tion is. generally; 1ncomplete, and the re- `turning vapor issaturated to a greater or less .degree with liq`uid. The returning .saturated vapor` frequently carries scale from'the pipmg system. When the vapor asses from e supply pipel into the chamer 21' it impinges'upon the depending wall 2.2 and the/ liquid. and the scale are tprecipin tated from the vapor to thewall an subsequentlyto the bottom-of the chamber. The

vapor meanwhile passes the barrier and. is supplied to the ovlinder through the port opening' 8. in rhalnher l eansrs the latter lo act as a Iaction trap ior lh'e eoinpressor, the trap shown herein being proportioned to have a volumetric eapaoitlv capable of Vonoe oompletel)v iilling eaeh cylinder.

l 'laini as my invention:

1. ronlpri-issor having, in combination, a Cylinder having,r an inletportpa 'piston rompriaing a head. portion. andl a body portion ha ving` a central portion and a plurality of'iadiall'v disposed vanos forming renti-al angles, and inlet valves in said head portion :dined with the' central angles delined liv sa id vanos wlnirehy a direetarnl nnobslrni-led pase-age is provided from said port lo each oi said valves.

.2. A compressor havil'ig, in eomliimitioif. a cylinder having' an inlet port` a, pistw romprisinna head portion and a eroe-v. shaped body portion. and inlet valves in Hai. head portion alined` with the quadrante ditined b v said body portion whereby a direrf and unobstructed passage is provided frol,I

said port to each ot said valves.

3. A compressor having, in eon'ilnnation. a piston, an inlet ein-tion valve in Sil-id piston. a pin in thepiston.extending loosely through said valve for limiting:l the reciprocz'ltorv -n'ioven1ent of said valve, and a pieton ring on said piston. for holdingA .ea-id pin in place 4. A eoinlnessor having', in eon'ibination` an inlet pipe, a plurality et' cylinders each having an inlet port, the adjacent walls .oi said cylinders iorn'iing-a elia-inber eonnnimieating with said'port-s and said inlet pipe` and a partition in said ehamher between said cylinder ports and Said inlet pipe whereby leaid chamber acts as a Suction trap.

5. A eon'ipressoi' ha ving, in Combina-tion,

ln' this manner the partition 22' my hand.

a plurality' of cylinders eachhaving a port,

an inlet pipe for supplying es to said cylinders, the adjacent Walls of forming a chamber' therebetween, said chamber connnnnieating with said ports and said pipe, a piston in each of said cylinders oomprisii'igva head portion und a body portion having acentral portion and a pli'nality of radiallydisposed vanes, means for admitsaid cylinders tingl gas from said pistons to within said cylinders, and a partition in said chamber betweenaid inlet pipe and said ports whereby said eha'niber will aet as a s uetion trap,

compressor having, in combination, apiistnm an inlet suction valve therein oomprising' a valve seat, Said piston having a chamber beneath said valve seat, a' valve stem guide' supported by the piston beneath said chamber to form the bottom Wall there- .oiand a hollownvalve stem having a head portion, ports in `the Wall of the stein oominnniratingwith said chamber beneath the valve seat and a complementary portion Slidahle within said guide, a pin in the piston extending loosely throngh'said valve for limiting the' reciproeatory movement of Said valve, and means for holding said pin in Yplace on Said piston.

JOHN o. eoovEL, JR. 

